Edwin a



(No Model.)

B. A. SOHOLPIELD.

' v THREAD TENSION DEVICE. No. 303,325; Patented Aug. 12, 1884.

UNITE STATES PATENT OFFICE.

EDWIN A. SCHOLFIELD, OF WESTERLY, RHODE ISLAND.

THREAD-TENSION DEVICE.

SPECIFICATION forming part of Letters Patent No. 303,325, dated August 12, 1884.

Application filed November 19, 1883.

To all whom it may concern.-

Be it known that I, EDWIN A. SCHOLFIELD, of Westerly, of the county of \Vashington and State of Rhode Island, have invented certain Improvements in Tension Devices, of which the following is a specification.

This invention relates to an improved device adapted for application to shuttles, sewing, and other machines, to place a regular and constant tension on a running thread.

In the accompanying drawings, forming a part hereof, Figure I illustrates one of the many uses to which my invention may be applied. Fig. II is a partly sectional view of the invention. Fig. III is an exterior view of the invention as seen from a different point.

with grooves 12, to guide the thread to and from the device and retain the thread directly nnd er (No model.)

the center of the ball, and it is perforated at its under side for the holding-screw c.

In Fig. I of the drawings the device is shown as applied to a thread running from a spool or bobbin; but it may be used in connection with a shuttle or any machine where a running thread is to be held at a constant tension. I

I am aware that loose spherical weights have been used in various devices to give tension to cords and threads, and I do not there fore claim, broadly, a Weight inclosed in a holder; but

\Vhat I do claim is i In a tension device, a spherical weight inclosed in a spherical shell open at the top, and having overlapping sides to limit the upward movement of the weight therein, grooves to guide the thread, and a central perforation, combined with a holding-screw seated in the said perforation, substantially as specified.

EDWIN A. SOHOLFIELD.

Witnesses:

J. HOWARD MORGAN, EUGENE B. PENDLETON. 

